4Chuang SK,Ca IT, Doug lass CW.et al. Fra iky approach forthe analysis of cluste red failure time observa tions in denta 1research[J]. J Dent Res,2005,84(1) : 54.
5Boyne PJ,James RA.Grafting of the maxillary sinus floor with autogenous marrow and bone[J].J Oral Surg,1980,38 (8):613-616.
6Arai Y,Tammisalo E,Iwai K,et al.Development of a compact computed tomographic apparatus for dental use[J].Dentomaxil-lofac Radiol,1999,28(4):245-248.
7Mozzo P,Procacci C,Tacconi A,et al.A new volumetric CT machine for dental imaging based on the cone-beam technique:preliminary results[J].Eur Radiol,1998,8(9):1558-1564.
8Tatum H Jr.Maxillary and sinus implant reconstructions[J].Dent Clin North Am,1986,30(2):207-229.
9van den Bergh JP,ten Bruggenkate CM,Disch FJ,et al.Anatomical aspects of sinus floor elevations[J].Clin Oral Implants Res,2000,11(3):256-265.
